I considered a monotube for a minute, but part of the main point of the coil conversion was reliability and robustness (not looking to start another EAS v coil debate here, I persoanlly like both for differnt reasons) and if you dent a monotube for the most part its toast, the plunger inside won't be able to travel anymore or at least not very well. The ES9000s are pretty big in diamater compared to the OE shocks and the extra fliud volume really does help heep them from cooking the fliud inside if you have a long harsh ride and are great at resisting shock fade.
I tried to have Doetsch sell me a set of the Baja shocks but they dropped the ball bigtime and didn't really seem to want my money - they have absolutely no communication skills with their customer's whatsoever and kept strangely insisting I had a Discovery even after I gave them all the vehicle specs, mounting style and travel length etc. I was pretty bummed because their stuff seems really nice but I'm quite happy with the ProComps. I'd be willing to put them on my Disco as well once my Monroe Sensa-Turds are cashed out.
And yes all 4 corners are exactly the same. I think I paid $30-something for each one at my local 4WheelParts 'we-don't-know-what-the-hell-you're-talking-about-unless-its-a-jeep-isn't-Land-Rover-made-by-toyota?' retailer.
A made in USA lifetime warranty shock for that inexpensive just couldn't be passed up.